Add blood decals, gore, mobile HUD, web start gate + touch/perf tests

Remove tools/fstest.html scratch page used to probe browser
fullscreen/orientation APIs.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EznnY8rH2dXhtono1kwsXg

bear.gd

@@ -116,9 +116,10 @@ func _ready() -> void:
 			# The smash/leap clips end held at full scale (Siim only ramped the claw clips back
 			# down), so snap each effect back to 0 when its clip finishes — keeps them one-shot.
 			_fx_player.animation_finished.connect(_on_fx_finished)
-	# Web (Mali/ANGLE) can't run Compatibility vertex-skinning; rebuild the bear as
-	# non-skinned bone-attached pieces there. Desktop keeps smooth GPU skinning.
-	if OS.has_feature("web"):
+	# Native GPU skinning by default (the Mali/ANGLE invisible-skinning bug is fixed in the 4.7
+	# web templates). The bear is a single dense organic mesh, so the rigid-skin fallback tears
+	# seam holes as it animates — another reason native is the default. See rigid_skin_enabled().
+	if Controls.rigid_skin_enabled():
 		RigidSkin.convert_tree(self)
 	if _anim_player:
 		_anim_idle = _resolve_anim(["IDLE_ON4LEGS", "IDLE"])
@@ -883,6 +884,7 @@ func _take_hit(hit_dir: Vector3, strength: float) -> void:
 	hit_dir.y = 0.0
 	hit_dir = hit_dir.normalized()
 	_blood_burst.burst(global_position + Vector3(0.0, 1.4, 0.0), hit_dir)
+	Gore.splat(global_position, hit_dir, 1.1)
 	_shake(clampf(strength / 15.0, 0.4, 1.0))
 	if _hp <= 0:
 		_die(hit_dir)
@@ -918,6 +920,7 @@ func _die(hit_dir: Vector3) -> void:
 		_hit_area.monitoring = false
 	velocity = Vector3.ZERO
 	_blood_burst.burst(global_position + Vector3(0.0, 1.4, 0.0), hit_dir)
+	Gore.splat(global_position, hit_dir, 1.4)
 	_play(_anim_death)
 	# No death clip on the rig — topple the beast onto its side (about the hit direction,
 	# so it falls the way it was struck) and sink it away, then free.